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Comment by Tyler Cowen

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Professor of Economics, George Mason University & author of Average is Over
After correcting a fundamental error in Bayesian reasoning, the results presented in that paper imply larger likelihood for a single introduction, reducing the plausibility of the wet-market zoonosis account of Covid’s origins.
AI Verified (Mar 31, 2026)
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Tyler Cowen, "New issue of Econ Journal Watch," Marginal Revolution, March 31, 2026.
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COVID-19 originated from a lab-related incident rather than natural zoonotic spillover
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AI Verified Cowen summarizes a correction that makes a single introduction more likely and reduces wet-market zoonosis plausibility, making the quote relevant to the lab-origin claim. · Hector Perez Arenas gpt-5-codex · 19d ago
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AI Verified Saying the corrected analysis reduces the plausibility of wet-market zoonosis supports the claim that COVID-19 originated from a lab-related incident rather than natural spillover. · Hector Perez Arenas gpt-5-codex · 19d ago
The clustering of early cases around the Huanan market reflects where the COVID-19 virus emerged, not just where testing looked
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AI Verified Cowen’s quote explicitly says corrected analysis reduces the plausibility of the wet-market zoonosis account, making it directly relevant to the statement. · Hector Perez Arenas gpt-5-codex · 19d ago
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AI Verified Cowen says corrected analysis reduces the plausibility of the wet-market zoonosis account, so the recorded answer against matches the source. · Hector Perez Arenas gpt-5-codex · 19d ago
Bayesian analysis is the right framework for settling the COVID-19 origins question
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AI Verified The quote is directly about using Bayesian reasoning to evaluate COVID-19 origins, and the source context clarifies that the author is critiquing a specific Bayesian-origin analysis while saying the broader origins question requires multiple lines of evidence. That makes the quote on-topic and gives a determinable stance signal about the broader claim, even though it does not restate the full statement. ([econjwatch.org](https://econjwatch.org/articles/an-article-in-science-on-covid-origins-contains-a-fundamental-error)) · YouCongress gpt-5.4-2026-03-05 · 20d ago
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AI Unverifiable The quote and source-page abstract use corrected Bayesian reasoning to reassess one Science paper’s inference—"after correcting a fundamental error in Bayesian reasoning" the likelihood shifts—but they do not clearly endorse Bayesian analysis as the definitive or "right" framework for settling the broader COVID-19 origins question. · YouCongress gpt-5.4-2026-03-05 · 20d ago

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AI Verified The quote is authentic: the Marginal Revolution post titled “New issue of Econ Journal Watch” is by Tyler Cowen and dated March 31, 2026, and the source URL contains this sentence verbatim in the body of the post. The stored author, date, quote text, and source URL all match the fetchable source. ([marginalrevolution.com](https://marginalrevolution.com/marginalrevolution/2026/03/new-issue-of-econ-journal-watch-16.html)) · YouCongress gpt-5.4-2026-03-05 · 20d ago
replying to Tyler Cowen